CN209347191U - A kind of electromagnetic drive intramedullary needle can be used for bone carrying - Google Patents
A kind of electromagnetic drive intramedullary needle can be used for bone carrying Download PDFInfo
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- CN209347191U CN209347191U CN201821301064.5U CN201821301064U CN209347191U CN 209347191 U CN209347191 U CN 209347191U CN 201821301064 U CN201821301064 U CN 201821301064U CN 209347191 U CN209347191 U CN 209347191U
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- bone
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- permanent magnet
- lead screw
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Abstract
The utility model relates to a kind of electromagnetic drive intramedullary needles that can be used for bone carrying, it is characterized in that, including the internal electromagnetic drive traction mechanism being connected between self epiphysis and osteotomy end, the internal electromagnetic drive traction mechanism can control in vitro drives that carry bone section mobile to the direction far from the osteotomy end under the driving of electromagnetic field.The utility model passes through the permanent magnet rotating in intramedullary needle in cordless driving body using external alternating electromagnetic field, and then the lead screw in intramedullary needle is driven to rotate, lead screw rotation drives mobile with the direction for carrying guiding piece to separate osteotomy end that bone section is connect, carrying bone section is set gradually to move through defect section, finally knitting is realized with bone defect end in contact and by pressurization, bone can be completed in intramedullary needle dismounting after bony union to carry, to realize it is noninvasive, at the uniform velocity pull osteotomy at periosteum, periosteum skeletonization is induced, realizes that bone defects are rebuild.
Description
Technical field
The utility model relates to a kind of medical instruments, specifically about in a kind of electromagnetic drive marrow that can be used for bone carrying
Needle.
Background technique
Clinical wound, infection, tumour etc. can lead to long bone of limbs large segmental bone defect, for the big section at adjacent joints position
Bone defect generally uses metal prostheses to rebuild or allosome bone remoulding, but for (long bone middle section position) defect at backbone, always with
Not generally acknowledge optimal method for reconstructing.Currently, common method includes allogenic bone transplantation, autologous bone transplanting, the vacation of middle section metal
Body etc., but these methods have higher failure rate.For four limbs middle section bone defect, bone, which is carried, can achieve biology reconstruction
Effect, and long term complication is less.Traditional bone method for carrying is that external fixing rack drawing carries section, stretches periosteum and then induces bone
Film skeletonization, the final Bone Defect Repari for realizing defect section, the type of external fixing rack include annular intramedullary needle and monolateral external frisket.It is outer solid
Determining frame is section to be carried using several pieces of metal fixed pins are fixed, after osteotomy by external metal or carbon attachment device
Begin through within 5-7 days it is slowly mobile with the steel needle for carrying section bone fixation in vivo, by periosteum at drawing osteotomy, induction periosteum at
Bone is graduallyd mature to periosteum skeletonization, is formed pulp cavity structure and is realized that blood fortune is established, then outrigger and metal fixed pin are removed.
Since the treatment time that bone is carried is longer, according to defect length difference, patient generally requires to wear the outrigger several months extremely
1-2 etc..External fixing rack carries out bone and carries existing matter of utmost importance to be pin track infection, and document report infection rate is 30-
47% differs, and receives to may occur in which soft tissue contracture, the complication such as fibrosis and greendstick fracture during outrigger treatment.Clinically,
In order to reduce the incidence of complication rate, especially pin track infection, outrigger generally can be shortened by Complex fixation
Using the time, and then reduce infection probability.Common Complex fixation have the compound intramedullary needle of outrigger or outrigger clad steel plate into
Row bone is carried, i.e., handling process is carried out by outrigger, but after carrying section movement, is consolidated by intramedullary needle or steel plate
It is fixed, so as to remove outrigger, outrigger can be shortened in this way and use the time.But it is still inevitable using outer in handling process
Frame, to occur due to infection caused by outrigger use, tendon interference etc..And for Complex fixation, once go out
Even more serious consequence will be occurred by now infecting, and because still having metal inside-fixture in vivo, can not only be treated by debridement, need by
In-vivo metal inside-fixture complete resection.Secondly, the metal fixed pin of traditional external fixing rack is needed across the soft tissues knot such as muscle
Structure, these metal fixed pins often will affect contraction of muscle and then cause joint motion limited, and patient during outrigger extension
It is unable to walking with load, patient comfort is lower during wearing outrigger, in addition to walking with load function limitation, controls using external fixing rack
Outrigger will affect patient since size is larger and wear the clothes during treatment, and especially in north cold area, winter needs thicker clothing
When, this disadvantage of outrigger is more obvious.
Relative to external fixing rack Limb lengthening, screw way sense in therapeutic process can be reduced using Internal fixation technology, such as intramedullary needle
The risks such as dye, fracture, but traditional intramedullary needle cannot achieve bone carrying.
Utility model content
In view of the above problems, the object of the present invention is to provide a kind of electromagnetic drive intramedullary needles that can be used for bone carrying.
To achieve the above object, the utility model takes following technical scheme: a kind of electromagnetic drive can be used for bone carrying
Intramedullary needle, which is characterized in that including the internal electromagnetic drive traction mechanism (1) being connected between self epiphysis and osteotomy end, institute
It states internal electromagnetic drive traction mechanism (1) and can control to drive under the driving of electromagnetic field in vitro and carry bone section and cut to far from described
The direction of epiphysis is mobile.
In a preferred embodiment, the internal electromagnetic drive traction mechanism (1) includes: outer sleeve (11), connection
Between the self epiphysis and osteotomy end, a sliding slot (15) are opened up along axial direction on the outer sleeve (11)；Permanent magnet (12), if
It sets in the outer sleeve (11), the permanent magnet (12) can control in vitro to be rotated under the driving of electromagnetic field；Linearly
Lead screw (13) is rotatably supported in the outer sleeve (11) along the axial direction of the outer sleeve (11), the linear lead screw (13)
One end connect with the permanent magnet (12) and can be with the permanent magnet (12) synchronous rotary；Guiding piece (14), is slidably arranged in institute
It states in outer sleeve (11) and threaded engagement is on the linear lead screw (13), and is solid through the sliding slot (15) and the carrying bone section
Fixed, the guiding piece (14) can drive the carrying bone section to far from the osteotomy end under the driving of the linear lead screw (13)
Direction it is mobile.
In a preferred embodiment, reduction gearbox (16) are set between the permanent magnet (12) and linear lead screw (13),
The input terminal of the reduction gearbox (16) connects the permanent magnet (12), and the output end of the reduction gearbox (16) connects the linear silk
Thick stick (13).
In a preferred embodiment, several screw holes are offered on the guiding piece (14), the carrying bone section is logical
It crosses several mono cortex screws (17) and passes through the sliding slot (15) and connect afterwards with the screw hole on the guiding piece (14).
In a preferred embodiment, the permanent magnet (12) uses cylindrical structure, is radially magnetized, material
Using neodymium-iron-boron magnetic material.
In a preferred embodiment, the screw pitch of the linear lead screw (13) is designed as 1mm.
Because the utility model adopts the above technical scheme, it has the following advantages: the utility model utilizes external alternation
Electromagnetic field drives the lead screw rotation in intramedullary needle by the permanent magnet rotating in intramedullary needle in cordless driving body,
Lead screw rotation drive is mobile with the direction for carrying guiding piece to separate osteotomy end that bone section is connect, makes to carry bone section gradually movement warp
Defect section is crossed, finally knitting is realized with bone defect end in contact and by pressurization, removes intramedullary needle after bony union
Complete bone carry, thus realize it is noninvasive, at the uniform velocity pull osteotomy at periosteum, induce periosteum skeletonization, realize bone defects rebuild.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the partial enlargement diagram of the utility model outer sleeve；
Fig. 3 is the driving principle figure that the utility model controls electromagnetic field in vitro.
Specific embodiment
The utility model is described in detail below with reference to embodiment.
Fig. 1 is illustrated according to electromagnetic drive intramedullary needle provided by the utility model, including internal electromagnetic drive traction mechanism
1, for being connected between self epiphysis 10 and osteotomy end 20, which can control electricity in vitro
It is driven under the driving in magnetic field and carries bone section 30 to the direction movement far from osteotomy end 20, move through carrying bone section 30 gradually scarce
Section is damaged, finally contacted with self epiphysis 10 and knitting is realized by pressurization, to realize the periosteum distraction osteogenesis of defect section.
In a preferred embodiment, internal electromagnetic drive traction mechanism 1 includes: outer sleeve 11 (shell), is connected to
Between self epiphysis 10 and osteotomy end 20, a sliding slot 15 (as shown in Figure 2) is opened up along axial direction on outer sleeve 11；Permanent magnet 12, if
It sets in outer sleeve 11, which can control in vitro is rotated under the driving of electromagnetic field；Linear lead screw 13, along outer
The axial direction of sleeve 11 is rotatably supported in outer sleeve 11, and one end of linear lead screw 13 connect with permanent magnet 12 and can be with permanent magnet 12
Synchronous rotary；Guiding piece 14, is slidably arranged in outer sleeve 11 and on the online sex pilus thick stick 13 of threaded engagement, and through sliding slot 15 with remove
It transports bone section 30 to fix, which can drive carrying bone section 30 to the side far from osteotomy end 20 under the driving of online sex pilus thick stick 13
To movement, sliding slot 15 is used to constrain the moving direction of guiding piece 14.
In a preferred embodiment, also reduction gearbox 16 can be set between permanent magnet 12 and linear lead screw 13, this subtracts
The input terminal of fast case 16 connects permanent magnet 12, the output end connecting line sex pilus thick stick 13 of reduction gearbox 16, and reduction gearbox 16 designs main
Purpose is to obtain biggish output torque and lower revolving speed.
In a preferred embodiment, several screw holes are offered on guiding piece 14, are carried bone section 30 and are passed through several lists
Cortex screw 17 is simultaneously connect after sliding slot 15 with the screw hole on guiding piece 14.
In a preferred embodiment, permanent magnet 12 uses cylindrical structure, is radially magnetized, and material uses neodymium
Fe-Mn magnetism material.
In a preferred embodiment, 11 outer diameter of outer sleeve is the different thicknesses size of 8-13mm, to meet different solutions
Cut open the patient of size bone.
In a preferred embodiment, the screw pitch of linear lead screw 13 is designed as 1mm.
As shown in Figure 1, Figure 3, when the utility model is used, routinely intramedullary needle mounting means, passes through defect section first
The long ossis in one end then passes through defect section, enters defect section other end ossis later；When intramedullary needle enters appropriate length
After (length is to carry bone section length), carries out retaining periosteum osteotomy under C arm perspective, continue into intramedullary needle after osteotomy
Distal end pulp cavity, and respectively at close, distal end installation pinning 40, intramedullary needle is fixed on to close, the distal tubular bone of defect section, is then led to
It crosses external locator mono cortex screw 17 and is fixed on bone section 30 is carried on guiding piece 14.When needing to carry out bone carrying, open
Electromagnetic field and close limbs of patient skin are controlled outside kinetoplast, external control electromagnetic field generates the alternating magnetic field of rotation at this time, passes through
The pole N of alternating magnetic field itself and S are extremely constantly alternately converted, and drive the permanent magnet 12 of patient's body to rotate, permanent magnet 12 is with moving-wire
Sex pilus thick stick 13 rotates and guiding piece 14 is pushed to slide axially along the sliding slot 15 of outer sleeve 11, so that driving guiding piece 14 carries bone
Section 30 is gradually pulled open at osteotomy by the mobile 1mm of promotion expense guiding piece 14 daily in this way to far from the movement of 20 direction of osteotomy end
Sutura gap makes carrying bone section 30 gradually move through defect section, realizes the periosteum distraction osteogenesis of defect section.
The various embodiments described above are only used for carrying out exemplary retouch to the purpose of this utility model, technical scheme and beneficial effects
It states, it is not limited to above-mentioned specific embodiment, within the spirit and principle of the utility model, any modification for being made,
Equivalent replacement, improvement etc., should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of electromagnetic drive intramedullary needle that can be used for bone carrying, which is characterized in that including being connected to self epiphysis and osteotomy end
Between internal electromagnetic drive traction mechanism (1), the internal electromagnetic drive traction mechanism (1) can control electromagnetic field in vitro
Driving under drive that carry bone section mobile to the direction far from the osteotomy end.
2. electromagnetic drive intramedullary needle according to claim 1, which is characterized in that the internal electromagnetic drive traction mechanism
(1) include:
Outer sleeve (11) is connected between the self epiphysis and osteotomy end, is opened up one along axial direction on the outer sleeve (11) and is slided
Slot (15)；
Permanent magnet (12), in the outer sleeve (11), the permanent magnet (12) can control the drive of electromagnetic field in vitro for setting
It is rotated under dynamic；
Linear lead screw (13), is rotatably supported in the outer sleeve (11), the linear silk along the axial direction of the outer sleeve (11)
One end of thick stick (13) connect with the permanent magnet (12) and can be with the permanent magnet (12) synchronous rotary；
Guiding piece (14) is slidably arranged in the outer sleeve (11) and threaded engagement is on the linear lead screw (13), and passes through
The sliding slot (15) is fixed with the carrying bone section, and the guiding piece (14) can drive under the driving of the linear lead screw (13)
The bone section of carrying is to the direction movement far from the osteotomy end.
3. electromagnetic drive intramedullary needle according to claim 2, which is characterized in that the permanent magnet (12) and linear lead screw
(13) reduction gearbox (16) are set between, the input terminal of the reduction gearbox (16) connects the permanent magnet (12), the reduction gearbox
(16) output end connects the linear lead screw (13).
4. electromagnetic drive intramedullary needle according to claim 2, which is characterized in that offered on the guiding piece (14) several
Screw hole, the carrying bone section by several mono cortex screws (17) and pass through the sliding slot (15) afterwards with the guiding piece (14)
On screw hole connection.
5. according to the described in any item electromagnetic drive intramedullary needles of claim 2 to 4, which is characterized in that the permanent magnet (12) is adopted
With cylindrical structure, radially magnetized, material uses neodymium-iron-boron magnetic material.
6. according to the described in any item electromagnetic drive intramedullary needles of claim 2 to 4, which is characterized in that the linear lead screw (13)
Screw pitch be designed as 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301064.5U CN209347191U (en) | 2018-08-13 | 2018-08-13 | A kind of electromagnetic drive intramedullary needle can be used for bone carrying |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821301064.5U CN209347191U (en) | 2018-08-13 | 2018-08-13 | A kind of electromagnetic drive intramedullary needle can be used for bone carrying |
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| CN209347191U true CN209347191U (en) | 2019-09-06 |
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| CN201821301064.5U Active CN209347191U (en) | 2018-08-13 | 2018-08-13 | A kind of electromagnetic drive intramedullary needle can be used for bone carrying |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108904026A (en) * | 2018-08-13 | 2018-11-30 | 北京大学人民医院 | It can be used for the electromagnetic drive intramedullary needle of bone carrying |
| CN111345882A (en) * | 2020-04-09 | 2020-06-30 | 南方医科大学第三附属医院 | Intramedullary pressure applying robot capable of replacing transverse bone moving |
| US11065037B2 (en) | 2016-05-19 | 2021-07-20 | Auctus Surgical, Inc. | Spinal curvature modulation systems and methods |
| CN116919556A (en) * | 2023-08-03 | 2023-10-24 | 上海康定医疗器械有限公司 | Bone extension intramedullary nail device and electromagnetic intramedullary limb reconstruction system |
-
2018
- 2018-08-13 CN CN201821301064.5U patent/CN209347191U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11065037B2 (en) | 2016-05-19 | 2021-07-20 | Auctus Surgical, Inc. | Spinal curvature modulation systems and methods |
| CN108904026A (en) * | 2018-08-13 | 2018-11-30 | 北京大学人民医院 | It can be used for the electromagnetic drive intramedullary needle of bone carrying |
| CN111345882A (en) * | 2020-04-09 | 2020-06-30 | 南方医科大学第三附属医院 | Intramedullary pressure applying robot capable of replacing transverse bone moving |
| CN116919556A (en) * | 2023-08-03 | 2023-10-24 | 上海康定医疗器械有限公司 | Bone extension intramedullary nail device and electromagnetic intramedullary limb reconstruction system |
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